20720350 has 48 divisors (see below), whose sum is σ = 44916768. Its totient is φ = 6963840.

The previous prime is 20720347. The next prime is 20720363. The reversal of 20720350 is 5302702.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17992 + ... + 19108.

It is an arithmetic number, because the mean of its divisors is an integer number (935766).

Almost surely, 2^20720350 is an apocalyptic number.

20720350 is an abundant number, since it is smaller than the sum of its proper divisors (24196418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20720350 is a wasteful number, since it uses less digits than its factorization.

20720350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 20720350 is about 4551.9611158269. The cubic root of 20720350 is about 274.6622851622.

The spelling of 20720350 in words is "twenty million, seven hundred twenty thousand, three hundred fifty".